Improvement in propelling-apparatus



Zittend Siena Josera PARADIS, or BnooKLYN, ANEW YORK.

Letters Patent No.v93,337, dated vAugust 3,1869.

dl-w'- i IMPROVEMENT IN PROPELLING--APPARATUS The Schedule referred toin these Letters Patent and making part of the same.

'to give the vessel headway, or one or more may be located towards thefront for backing. Y

I will proceed to describe one "of thein, reference being had to theannexed drawing, wherein- .1

Figure lis a vertical longitudinal section of the propeller, as readyfor ordinary use.

Figure 2 is a section, with the nozzlefor backing turned down.

Similar marks of reference denote the same parts. a represents a portionof a vessel. b is a cylinder, opening at the rear and through the c is apiston, upon a rod, cl, that passes through the .head e, a stufiing-boxbeing provided at this point.

The piston-rod d is prolonged into the steam-cylinder f, and fitted witha piston, g,'and from the crosshead h a pitman, i, connects with acrank, k, shaft l, and fly-wheel, to regulate the movement.

The` valve of the steam-engine is constructed and operated so that steamis supplied only on the forward end of the piston, to force that back,and alsothe piston e, and eject the water from the cylinder b, so thatthe same, acting upon the exterior water, shall canse a movement of thevessel in the reverse direction.

The steam is to be allowed to escape or led to a condenser, so thatthere will be nothing to hinder the free return of the steam audwater-pistons by the agency of the fiy-wheel, aided by the force of thewater pressing, by its hydrostatic column upon the piston c, andrefilling the cylinder b.

In lconsequence of' the pressure of water andthe momentum, the pistonsmight come back too rapidly and strain the crank-pin. I therefore makean air-chamber or cushion by the cylinder @between the piston c and heade, and I provide an air-vessel or reservoir, m, into which the air isforced by the backward movement of the piston, and to this air-vessel asafety-valve, n, is fitted, to retain the pressure of air which may benecessary to counterbalance the pressure ofthe `water upon't-hepistou'at the extreme backward movement, and hence to aid in startingthe piston, when it is again moved to eject the water from the cylinder.

A valve, 0, opening inwards, is to be used -to admit air freely into thecylinder b, behind the piston @,as the same is moved to eject the water.

The vessel may be given stern-way or backed by 4the use of a returnnozzle, s, that is made as a half circle, and fitted upon an axis at t,so that a lever, c, can be used for swinging the nozzle around,'so as tocoincide with the rear end of the cylinder I), in order that the watermay be projected towards the front of the vessel. p

rIhe saine effect may be produced by a standing pipe with a valve, to beturned up, and close the rear discharge-pipe or nozzle, and-simultaneously open the forward discharge-nozzle. The discharge-nozzles may be swung around by gearing, in place of the level o.

I do not claim an air-cushion, nor the use of such a device in aseparate cylinder, in connection with a propeller,

What Ielaim, and desire to secure by Letters Patent, is-`- 1. Theair-vessel m, safety-valve a, and inlet-valve o, applied to the innerend ofthe propeller-cylinder b, and combined with the piston c, in themanner and lfor the purposes set forth.

2. In eon-ibination with the said air-vessel, valves, piston,andpropeller-cylinder b, the steam-cylinder f, and steam-valve, arranged inthe manner specified, so as only to admit steam to act in the sainedirection as the air of the aircushion,'i`or projecting the water fromthe cylinder 11, as set forth.

3. The return nozzle s, fitted aspspecified, so as to be swung' tocoincide with the end of the cylinder b,`as and for the purposes setforth.

In witness whereof, I have hereunto set myfs'ignature, this 11th day ofFebruary, A. D. 1869.

JOSEPH PARADIS.

Witnesses:

' Criss. H; SMITH,

Guo. T. PiNcKNnY.

